Self-filling fountain-pen and locking device therefor.



PATENTED JULY 23, 1907-.

T. STEVENS. SELF FILLING FOUNTAIN PEN AND LOOKING DEVICE THEREFOR.

APPLICATION FILED NOV. 23,1906.

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THORNTON STEVENS, OF NEAR FLORESVILLE, TEXAS.

SELF-FILLING FOUNTAIN-PEN AND LOCKIN G DEVICE THEREFOR.

Specification of Letters Patent.

Patented July 23, 1907.

Application filed November 23, 1906. Serial No. 344,800.

To all whom it may concern:

Be it known that I, THORNTON STEvENs, a citizen of the United States, residing in Wilson county, Texas, near Floresville, R. F. D. No. 3, have invented a new and useful Improvement in Self-Filling Fountain- Pens and Locking Devices Therefor, of which the following is a specification.

My invention relates to improvements in self-filling fountain pens and the locking device therefor.

The object of the invention is to provide a fountain pen in which by the use of a piston rod on the principle of a suction pump the pen can be easily, fully and securely filled and easily cleaned, and which being provided with detachable parts may be repaired readily when worn or broken. I attain these objects by the mechanism illustrated in the accompanying drawing in which Figure 1 is a longitudinal section of the entire pen when filled ready for use; Fig 2 is a longitudinal section of the pen when empty and ready to be inserted in the ink for filling; Fig. 3 shows transverse sections of the cover and the ink cylinder with the lock device.

The penis preferably made of hard rubber as is the usual fountain pen of any desired size and in all sizes the construction will be the same.

As shown, the pen comprises a tubular casing l of uniform diameter through its interior and having one end thereof closed by a cap 2, screwed thereon and provided with a screw-threaded socket 3 on its inner face, in which is screwed a piston rod 4 having a piston 5 at its free end. This piston is preferably made of hard rubber or other suitable material and is designed for a purpose to be hereinafter described. This casing 1, near its open end, is provided on the inner face thereof with spaced lugs 6, arranged in an annular series and the mouth thereof is thickened on its inner face to form an annular shoulder 7 for limiting the outward movement of the ink barrel or reservoir 10. This barrel 10 is also of uniform diameter throughout its interior, and is mounted to slide in the casing 1 on the piston rod 4,.

which passes through an opening 11 in its inner end, the piston 5 being arranged to operate within the ink barrel 10.

The head 12 carrying the pen point and feed duct is of ordinary or any desired construction and is screwed into the outer end of the ink barrel. This ink barrel 10 is provided on its outer face near its inner end with a plurality of spaced locking ribs or lugs 13, arranged in an annular series therearound, and which are designed to slide through the spaces between the lugs 6 on the inner face of the outer end of the case when the bar is turned in one direction, whereby the barrel is permitted to slide freely in the casing and when the barrel is drawn forward and turned in the opposite direction these lugs 13 fit in the space between the lugs 6 and the shoulder 7 and lock the bar against longitudinal movement. The outer surface of the outer end of the barrel 10 is preferably reduced to receive a cover 14 for the pen point.

In the use of this device, when the pen is to be filled, the casing 1 is turned until the lugs on the barrel and cover change places, and the lugs 13 are opposite the spaces or stops between the lugs 6, when, by pressing on the casing, the piston will slide through the ink barrel 10 into the position shown in Fig. 2 expelling all the air from the barrel. The end of the pen is then inserted in the ink and the casing drawn back leaving a vacuum in the ink barrel 10, which is instantly filled with ink. The casing is then turned to lock it to the barrel by means of the lugs 6 and 13 and the pen is ready for use.

To clean the pen, the ink barrel and casing are unlocked and the piston is used to draw in and expel water therefrom until the barrel is thoroughly cleaned.

I claim as my invention,

1. In a fountain pen, the combination of a tubular holder or casing having a closure for one end thereof, a piston rod secured at one end to the inner face of said closure and having a piston at its other end, an annular series of spaced lugs arranged on the inner face of said casing near its outer end, an ink barrel mounted to slide in said casing on said piston rod, the piston being disposed in said barrel, and an annular series of spaced lugs arranged on the outer face of said barrel near its inner end for engagement with the lugs on said casing.

2. In a fountain pen, the combination of a tubular holder or casing having a closure for one end thereof, a piston rod secured at one end to the ,inner face of said closure and having a piston at its other end, an annular series of spaced lugs arranged on the inner face of said casing near its outer end, an ink barrel mounted to slide in said casing on said piston rod, the piston being disposed in said barrel, an annular series of spaced lugs arranged on the outer face of said barrel near its inner end for engagement with the lugs on said casing, and an annular shoulder formed on the inner face of said casing at its outer end and spaced from the lugs thereon to limit the outward movement of said barrel.

THORNTON STEVENS.

Witnesses:

R. L. BALL, R. P. INGRUM. 

